The video tutorial explains how to use terminal commands to check memory usage on a computer. It covers the 'free' command to display available RAM and discusses how rounding affects the displayed values. The tutorial also introduces the 'VM stat' command, which provides detailed memory statistics, including free memory, buffer, cache, and swap information. The video emphasizes understanding memory usage and interpreting the data provided by these commands.

What should one be careful about when interpreting memory usage statistics?

What information does the 'vmstat' command provide?